Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Na data de 30/01/1991, quando o time visitante era o Liverpool, qual foi o placar?
 ###Tabelas: CREATE TABLE personnel_and_sponsoring (personnel_and_sponsoring_id AUTO_INCREMENT PRIMARY KEY, Team VARCHAR, Head coach VARCHAR, Team captain VARCHAR, Kit maker VARCHAR, Shirt sponsor VARCHAR, Past Season VARCHAR) CREATE TABLE performance_and_riding_the_mt125r (performance_and_riding_the_mt125r_id AUTO_INCREMENT PRIMARY KEY, RPM INT, Standard HP VARCHAR, Standard torque (lb/ft) VARCHAR, Standard speed (6th gear) VARCHAR, Modified speed (6th gear) INT, Modified HP VARCHAR, Modified torque (lb/ft) VARCHAR) CREATE TABLE fire_station_locations_and_apparatus (fire_station_locations_and_apparatus_id AUTO_INCREMENT PRIMARY KEY, Station VARCHAR, Engine Company VARCHAR, Ambulance VARCHAR, Address VARCHAR, Phone VARCHAR) CREATE TABLE canadian_national_championships_and_canadian_open_together (canadian_national_championships_and_canadian_open_together_id AUTO_INCREMENT PRIMARY KEY, Year INT, Men's singles VARCHAR, Women's singles VARCHAR, Men's doubles VARCHAR, Women's doubles VARCHAR, Mixed doubles VARCHAR) CREATE TABLE fourth_round_proper (fourth_round_proper_id AUTO_INCREMENT PRIMARY KEY, Tie no VARCHAR, Home team VARCHAR, Score VARCHAR, Away team VARCHAR, Date VARCHAR)  
SELECT Score FROM fourth_round_proper WHERE Date = 30/01/1991 AND Away team = liverpool